MX2013013880A - Meniscus coating apparatus and method. - Google Patents
Meniscus coating apparatus and method.Info
- Publication number
- MX2013013880A MX2013013880A MX2013013880A MX2013013880A MX2013013880A MX 2013013880 A MX2013013880 A MX 2013013880A MX 2013013880 A MX2013013880 A MX 2013013880A MX 2013013880 A MX2013013880 A MX 2013013880A MX 2013013880 A MX2013013880 A MX 2013013880A
- Authority
- MX
- Mexico
- Prior art keywords
- coating
- cover
- tray
- compartment
- roller
- Prior art date
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 124
- 239000011248 coating agent Substances 0.000 title claims abstract description 122
- 230000005499 meniscus Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 137
- 239000002184 metal Substances 0.000 claims abstract description 137
- 239000007789 gas Substances 0.000 claims description 56
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 239000012080 ambient air Substances 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229910052718 tin Inorganic materials 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910001128 Sn alloy Inorganic materials 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- -1 lead and tin) Chemical compound 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0035—Means for continuously moving substrate through, into or out of the bath
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0036—Crucibles
- C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
- C23C2/00362—Details related to seals, e.g. magnetic means
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating Apparatus (AREA)
- Coating With Molten Metal (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A meniscus coating apparatus and method for coating at least one surface of a metal strip includes an apparatus having an adjustable coating tray, a roll enclosure disposed adjacent the coating tray, an adjustable baffle, and/or a gas delivery device operable to help seal the roll enclosure.
Description
APPARATUS AND METHOD FOR COATING MENISCOS
PRIORITY
This application claims priority for the Patent Application
Provisional of E.U.A. with Serial No. 61 / 490,862, filed on May 27, 2011, entitled "BAFFLE SYSTEM FOR MENISCUS COATING APPARATUS", the description of which is incorporated herein for reference.
BACKGROUND OF THE INVENTION
The corrosion resistance of a metal rod can be improved by coating the bar with a molten metal, such as zinc. It has been known to anneal the metal bar, prepare the surface of the metal bar for coating in a protective atmosphere held in a compartment, and then submerge the metal bar in a bath of molten metal to coat the metal bar with the metal molten.
Immersion baths do not guarantee a consistent product quality of the metal bar. For example, changes in the surface condition with cast rolls that direct the metal bar through the bath can cause negative effects on the metal bar such as marks or scratches, as well as uneven coating thickness formation. In addition, immersion bathing methods often require a large
deposit of molten metal, with cast rolls, which is expensive for manufacturing and maintenance.
The meniscus coating methods are known, as described in the U.S. Patent. No. 5,453,127 entitled "Apparatus for Meniscus Coating to Metal Strip", published on September 26, 1995; and U.S. Patent No. 5,399,376, entitled "Meniscus Coating to Metal Strip," published March 21, 1995; whose patents are incorporated herein by reference. The metal bar is treated (for example, the metal bar is heated in an oven, or heated and cooled, to achieve a temperature close to the melting point of a coating metal before coating the metal bar with the metal bar). coating metal). After such treatment, the metal rod passes through a protective atmosphere, often non-oxidizing, contained in a compartment to reach a coating tray containing a pool of molten metal for coating. Normally, the metal bar passes near the pool of the molten metal and the surface tension narrows the space between the surface of the molten metal and the metal bar, which allows the molten metal to coat the bar.
The present application describes an apparatus for meniscal coating that provides coating of the bar outside the protective compartment by minimizing the entry of ambient air into the compartment containing the protective atmosphere.
BRIEF DESCRIPTION OF THE DRAWINGS
Although the specification concludes with claims that particularly and distinctly claim the invention, it is believed that the present invention will be better understood from the following description of certain examples taken in conjunction with the accompanying drawings, in which like reference numbers identify the same elements and in which:
Figure 1 illustrates an elevation view of a meniscus coating apparatus;
Figure 2 illustrates a perspective view of the exemplary apparatus for coating of Figure 1 and includes a first exemplary pair of baffles;
Figure 3 illustrates a perspective view of the exemplary apparatus for coating of Figure 1 and includes a second exemplary pair of baffles;
Figure 4 illustrates an elevation view of an exemplary deflector with a plurality of stamps;
Figure 5 illustrates an elevation view of the apparatus of Figure 1 and illustrates a first exemplary pair of devices for gas supply;
Figure 6 illustrates an elevation view of the apparatus of Figure 1 and includes a second exemplary pair of devices for gas supply; and Figure 7 illustrates an elevation view of the apparatus of Figure 1
and includes a third exemplary pair of devices for gas supply.
The drawings are not intended to be limiting in any way, and it is contemplated that various embodiments of the invention may be carried out in a variety of other ways, including those that are not necessarily illustrated in the drawings. The accompanying drawings incorporated and forming part of the specification illustrate various aspects of the present invention, and together with the description serve to explain the principles of the invention; however, it is understood that this invention is not limited to the precise arrangements shown.
DETAILED DESCRIPTION OF THE INVENTION
The following description of certain examples of the invention should not be used to limit the scope of the present invention. Other examples, features, aspects, embodiments and advantages of the invention will become apparent to those skilled in the art from the following description. As will be noted, the invention is capable of other obvious and different aspects, all without deviating from the invention. Accordingly, the drawings and descriptions should be considered as illustrative in nature and not restrictive.
As described in the Patents of E.U.A. No. 5,453,127 and 5,399,376, the patents of which are incorporated herein by reference, a metal bar is passed through an apparatus for
meniscus coating to coat it with molten metal. Prior to coating, the metal bar must be clean free of any rust or other materials that may adversely affect the adhesion of the coating. Such treatment and surface preparation are well known in the art. With respect to temperature, the metal rod can be heated in an oven, heated in an oven and then cooled, to achieve a temperature, as is well known in the art.
As the metal rod approaches the coating, this prepared condition must be maintained. This can be accomplished by containing the prepared bar in a roll compartment with a specialized, protective atmosphere as is well known in the art and as described in U.S. Patent No. 5,435,127. The roller compartment can be a substantially closed chamber that houses the coating trays in a protective environment together with forming rollers, which help to maintain the shape of the bar before coating. This metal bar advances beyond the coating trays to be coated with molten metal inside the compartment.
According to one embodiment of the present disclosure, a cover plate of a meniscus coating apparatus is disposed outside a roller compartment. The present description describes embodiments of a meniscus coating apparatus that maintains a protective atmosphere within a roller compartment,
while the coating tray is arranged outside the roller compartment. The meniscus coating apparatus of the present disclosure includes physical or pressurized gas barriers that allow the bar to exit the compartment while minimizing the entry of ambient air into the roller compartment, as described below. In addition, the physical or pressurized gas barriers described help maintain a protective atmosphere, in particular, help maintain an oxygen-free or at least substantially oxygen-free environment around the bar after it exits the compartment and until the molten metal coating is applied.
The cover pan includes a top cover for supplying a cover metal in a melted stage to a surface of a metal bar. Meniscus coating trays are well known in the art, and convenient trays include those described in US Patents. with No. 5,453,127 and 5,399,376, among others. The bar may comprise carbon steel, stainless steel or any other convenient metal bar. The coating metal may comprise zinc, aluminum, zinc magnesium, tin, lead and tin alloy (including lead and tin), or any other suitable coating metal, as is known in the art.
The metal bar is passed to the coating tray through a cover of a roller compartment. In particular, the metal bar is passed through a receiving portion
of an opening in the cover of the roller compartment, as will be described later. The opening in the cover of the roller compartment includes at least one open portion that does not receive the metal bar. The opening may extend completely or partially between edges of the cover.
An adjustable plate or baffle, more described below, is adapted to cover all or part of the open portion of the opening in the cover. The baffle may be disposed within the roller compartment or outside the roller compartment, such as above the cover. One or more seals may be disposed between the baffle and the cover pan, or between the cover pan and the roller compartment cover. The isolation of an area between the coating flanges of the coating trays and the cover by a deflector and / or seals, may allow the development of a positive gas pressure in that area which allows the distance between the coating flanges and the bar is bigger. For example, molten metal without support in the meniscus is tilted downward by a downward pull that is a balance between gravity and surface tension. For a given surface tension, there is a maximum distance from bead to bar before the meniscus falls, or escape from the arc shape and fall down when following a gravitational pull, since the surface tension would not be high enough to retain the molten metal. An increase in pressure below the meniscus can counteract the severity to allow a
Largest distance from bead to bar. Regulating the pressure may allow the meniscus coating process to start at a low pressure and increase the pressure as the bar-to-bar distances increase. For example, larger distances from flange to bar allow an increased amount of possibilities in bar shape variation.
Referring to Figure 1, a pair of cover trays (10) arranged in a horizontal position is shown. Although a pair of coating trays (10) is shown, one embodiment of the present disclosure may include a single coating tray (10). Each cover tray (10) includes an upper flange (12), a lower edge (14) and a side wall adjacent to the flange (16) extending between the upper flange (12) and the lower edge (14). The upper flange (12) and / or the coating tray (10) comprise a ceramic, a plastic ceramic, a metal, a waterproof material and / or other suitable material and combinations thereof. The coating tray (10) can be heated by gas burners and / or by induction heating. Each upper flange (12) is layers of coating at least one surface (18) of metal bar (20) with a covering metal. When the metal bar (20) passes next to the coating tray (10), the surface tension narrows a space between the molten metal in the upper flange (12) and the metal bar (20) to coat the metal bar (20) with the coating metal. As will be understood by those skilled in the art, other tray configurations can also be used for
coating on the coating apparatus.
The coating metal comprises a molten metal, such as zinc, aluminum, tin and / or a metallic lead-tin alloy (including lead and tin) or other molten metal that can be used to coat a metal rod. Suitable coating metals are well known in the art. In case more than one tray is used for coating, each coating tray may contain the same coating metal or a different coating metal so that different coating metals are applied on opposite sides of the metal bar (20). A first surface (18) of the metal bar (20) can be coated with a first coating metal, and a second and opposite surface (18) can be coated with a second coating metal. For example, one side of the metal bar (20) can be coated with a tin coating and another side of the metal bar (20) can be coated with a coating of zinc or a metallic lead-tin alloy.
Referring to Figure 1, the roller compartment (22) having a cover (24) is disposed adjacently and below the coating trays (10) which can be separated at different distances. A positioning device, as is apparent to a person with basic knowledge in the art in view of the present teachings, can be used to adjust the coating trays (10) to a desired position.
the upper flanges (12) should be at least sufficient to allow the passage of the metal bar (20) while providing the meniscus coating of surfaces (18) of the metal bar (20) through the flanges higher (12).
Within the roller compartment (22) at least one roller (26) can be arranged. In the embodiment of figure 1 there is shown a pair with rollers (26) that must be arranged in front of and below the cover (24) of the roller compartment (22). The roller (26) is configured to shape and / or flatten the metal bar (20) as it moves past the rollers (26) to the cover (24) of the roller compartment (22) and to the trays for coating (10). Such forming rollers are well known in the art.
The cover (24) of the roller compartment (22) includes an opening (28). A portion of the opening (28) in the cover portion (24) may be covered by baffles, as described below, to minimize air ingress to the roller compartment (22) near the metal bar (20). ) or to minimize contact of the metal bar with the ambient atmosphere before coating. The opening (28) includes a bar receiving portion (30), which is the portion of the opening (28) occupied by the metal bar (20) during the coating, and at least one open portion (32) that is any portion of the opening (28) not occupied by the metal bar (20) during the coating (figure 2). Referring again to Figure 1, the bar receiving portion (30)
It has the size and shape to receive the metal bar (20). The metal bar (20) has a width and bar thickness, and the opening (28) has an opening width and thickness that are larger than the width and bar thickness of the metal bar (20) so that the entire opening (28) does not receive the metal bar (20) and only the bar receiving portion (30) receives the metal bar (20). Any open portion (32) does not receive a portion of metal bar (20).
At least one adjustable plate or baffle (34) may be arranged to cover a part or all of the open portion (32). The baffle (34) can be manually and / or automatically adjusted in a desired position through, for example, edge sensor systems such as those provided by EMG-Automation GmBH, D-57482 Wenden, Germany; Keyence Corporation, Itasca, Illinois; FMS Force Measuring Systems AG, Hoffman Estates, Illinois; and Microsonic GmbH, 44227 Dormund, Germany; as it will be apparent to a person with basic knowledge in the art in view of the present teaching.
Referring to Figure 2, the open portions (32) surround the bar receiving portion (30) that receives the metal bar (20). A baffle (34) is disposed on the open portions (32). The deflectors (34) prevent a substantial leakage of ambient air into the roller compartment (22) through open portions (32) of the cover (24) of the roller compartment (22) and help provide a positive pressure between a space (S) defined below the flanges
upper (12) of the coating trays (10) and the cover (24).
Figure 2 shows a baffle mode (34) including a flat portion (36). The flat portion (36) is disposed on the open portion (32) of the opening (28) of the cover (34) of the roller compartment (22). Figure 3 shows another form of baffle (34) including a flat portion (36) and a side wall portion (38). The flat portion (36) includes an inner edge (40) facing the bar receiving portion (30) and a side wall portion (38) extending upwardly from the lower edge (40) for splicing against a lateral edge of the metal bar (20) as received by the bar receiving portion (30) of the opening (28). The side wall portion (38) is designed to seal against the side wall (16) adjacent the flange of each cover pan (10) through the sidewall edge of the baffle (40). The side wall edge of the baffle (40) may comprise a flexible material such as a fiberglass cloth that helps seal the side wall edge of the baffle (40) against the side wall adjacent the flange (16). Alternatively, the side wall portion (38) can be similar to the shape of the side wall adjacent the flange (16) and allows a clearance to allow a desired positioning of each cover pan (10).
Additionally or alternatively, as shown in Figure 4, a plurality of seals (42) can be disposed between the cover (24) of the compartment with rollers (20) and upper flanges (12) of trays for
coating (10). The seals (42) are shown to be disposed below the top flanges (12) of the cover pans (10), each seal (42) being disposed between the side wall edge of the baffle (40) and the adjacent side wall to the flange (16) of each covering tray (10).
Each coating tray (10) can include a surface (44) so that a second seal (42) can be disposed between the surface (44) and the cover (24) of the roller compartment (22). For example, as shown in Figure 4, second seals (42) are provided between the surface (44) of each cover pan (10), wherein the surfaces (44) are shown as a surface below the trays for coating (10) and a top cover surface (24) of the roller compartment (22).
In addition to the physical barriers described above, or alternatively, a gas barrier can be used to help seal the compartment. A device for supplying gas may be arranged in the coating apparatus in front of the upper flange of the coating tray, generally close to the cover of the roller compartment. The gas supply device operates to supply a gas, such as nitrogen, in the area of the coating apparatus before coating the metal rod. This gas supply can build a positive pressure around the pre-coated metal bar. In this way, it can help to provide or maintain a protective atmosphere around
of the pre-coated metal bar and thus minimize the effects of the ambient atmosphere on the previously coated metal bar. The gas supply device can also supply other convenient gases, such as hydrogen, to improve the heat transfer properties and / or to induce chemical reactions on the metal rod before coating the metal rod. For example, the gas supply device can supply nitrogen and low levels of hydrogen that are below an explosive limit and in an amount sufficient to allow improvements in heat transfer and react with the oxygen present in front and upstream of the top flange of the coating tray. The composition and effects of various desirable gases are known to those skilled in the art of coating metal rods.
The gas supply device can also help to solidify any excess coating metal and minimize the negative effects of any dripping of molten metal from the coating flanges. For example, when the gas supply device is disposed below the upper flange of the coating pan, the gas stream from the gas supply device can freeze any dripping metal coating that could escape from the metal bar and drip down towards the compartment with rollers. Without the gas supply device, the molten metal can drip on the forming rollers (26) and can freeze on these rollers, which eventually causes the operation to stop. If the device stops
Gas supply freezes the molten metal, this can help prevent, or at least minimize, this plating of the coating metal on the rollers.
At least one gas supply device (44) as shown in Figure 5, can be located in the coating apparatus after the forming rollers (if used) and in front of the upper flange (12) of the coating tray (12). The gas supply device (44) can be used in conjunction with one or more baffles. Alternatively, the gas supply device (44) or the baffle (34) can be used upstream of the upper flange (12) of the cover pan (10) to help prevent oxygen leakage to the area around the metal bar uncoated (20) and / or to capture and / or solidify leaking coating metal, whereby the exhaust coating metal is minimized to drip through the opening (28) towards the rollers (26).
The gas supply device (44) may comprise a pipe and nozzle assembly (46), as shown in Figures 5 to 6, or a plenum (48) as shown in Figure 7 and as described later. The gas supply device (44) can be operated to supply gas, such as nitrogen or another convenient gas, to help maintain a positive gas pressure near an area around the opening (28) to provide a more controlled atmosphere inside the compartment with rollers (22) and substantially inside the space (S)
arranged below the upper flanges (10).
Figure 5 shows a gas supply device (44) as a pipe and nozzle assembly (46) disposed between the rollers (26) and the cover (24) of the roller compartment (22). In particular, the pipe and nozzle assembly (46) is disposed below and upstream of the cover (24) of the roller compartment (22) and on and downstream of the rollers (26).
Figure 6 shows pipe and nozzle assemblies (46) disposed between upper flanges (12) of cover trays (10) and the cover (24) of the roll compartment (22). In particular, the pipe and nozzle assembly (46) is disposed in the space (S) below and upstream of the upper flanges (12) and on and downstream of the cover (24) of the roller compartment (22) . The pipe connection of the pipe and nozzle assemblies (46) can be separated from or mounted to the cover (24) of the roller compartment (22).
Figure 7 shows another embodiment of devices for gas supply (44) including plenums (48). Each plenum (48) acts as a positive pressure chamber to pass gas, such as nitrogen and as described above, to an uncoated surface (18) of the metal rod (20). The plenums (48) can be separated from or mounted to the cover (24) of the roller compartment (22). Figure 6 shows plenums (48) mounted surface below the cover (24) so that the plenums (48) are arranged upstream of the cover (24).
In operation, the metal rod (20) is treated, as described above, to achieve the desired condition, such as a clean, rust-free state. Then, the metal bar (20) is passed to the roller compartment (22) and can be formed by a pair (or more) with rollers (26). When in the roller compartment (22), the condition of the metal bar (20) is maintained as a roller compartment (22) which includes a protective atmosphere around the metal bar (20). The metal bar (20) advances through the opening (28) towards the upper flange (12) of the coating tray (10) to allow covering one or both surfaces (18) of the metal bar (20) with coating metal as described above. The physical and / or air pressure barriers, such as the deflector (34) and / or the gas supply device (44) are positioned between the upper flange (12) and the rollers (26) to help maintain a substantially oxygen-free environment around the pre-coated metal bar (20), both inside the roller compartment (22) and before the coating, prevent it from leaking into ambient air through the opening (28) into the compartment with rollers (22), and minimizing the effect of the ambient atmosphere on the pre-coated metal bar (20) after the metal bar (20) advances from the opening (28) of the closed compartment with rollers (22) towards the upper flange (12) of the coating tray (10).
For example, the flat portions (36) of the baffles (34) are arranged on open portions (32) of the opening (28). The
deflectors (34) may also include portions of side wall (38) sealing against the side wall adjacent to the rim (16) of the cover pan (10). The deflectors (34) seal some or all of the open portions (32) of the opening (28) to prevent ambient air / oxygen from being filtered into the protected environment within the roller compartment (22). As the metal bar (20) advances through the opening (28) and passes the deflectors (34) towards the upper edge (12) of the cover plate (10), the side wall portions (38) seal against the side edge portions of the advanced metal bar (20).
Additionally or alternatively, as described above, the gas supply devices (44) such as the pipe and nozzle (46) or plenum assemblies (48) are disposed proximal to the cover (24) of the compartment with rollers (24) and between the upper flange (12) and the rollers (26). As the metal bar (20) advances past the rollers (26) and before being coated by means of the upper flange (12), the gas supply devices (44) supply a gas such as nitrogen to the bar. metal (20) which helps maintain the clean and rust-free state of the metal bar (20). Further, if the upper portions of the metal bar (20) have already been coated with coating metal and the portions of that coating metal escape and drip down to the roller compartment (22) in a molten state, for example, the gas supply devices (44) can help to solidify the molten coating metal and prevent the molten metal from passing
to the roller compartment (22) to potentially affect the operation of the rollers (26).
The metal bar (20) advances towards the upper flange (12), which contains a sufficient amount of covering metal to, through the surface tension, adhere to and coat the surface (18) of the metal bar (twenty). The thickness of the coating of the molten metal in the metal rod (20) can be further adjusted by, for example, jet nozzles as described in the patent of US Pat. No. 5,453,127 which is incorporated herein by reference.
Having shown and described various embodiments of the present invention, further adaptations of the methods and systems described herein may be accomplished by appropriate modifications by one skilled in the art without departing from the scope of the present invention. Several such potential modifications have been mentioned and others will be apparent to those skilled in the art. For example, the examples, embodiments, geometries, materials, dimensions, proportions, steps, and the like described above are illustrative and are not required. Accordingly, the scope of the present invention should be considered in terms of the following claims and it should be understood that it is not limited to the details of the structure and operation shown and described in the specification and in the drawings.
Claims (16)
1. An apparatus for coating at least one meniscus surface of a metal bar, comprising: (a) at least one horizontally arranged coating tray, wherein the at least one tray for coating comprises an upper flange and wherein the upper flange is configured to cover the at least one surface of the bar; (b) a roller compartment disposed adjacent to the at least one tray for coating, wherein the roller compartment comprises a cover, wherein the cover comprises an opening, and wherein the opening comprises a bar receiving portion. and at least one open portion; and (c) at least one baffle, wherein the at least one baffle is configured to cover the at least one open portion of the opening.
2. The apparatus according to claim 1, further characterized in that it additionally comprises at least one device for supplying gas, wherein the at least one device supplying gas can be operated to supply gas, and wherein the at least one device for supplying gas is disposed in front of the upper edge of the by I or less a tray for coating.
3. The apparatus according to claim 1 further characterized in that the at least one tray for coating comprises a lower edge and a side wall adjacent to the flange extending between the upper flange and the lower edge, wherein the at least one baffle it comprises a side wall portion and a flat portion, and wherein the side wall portion is configured to provide seal along the top flange of the at least one tray for coating.
4. The apparatus according to claim 3 further characterized in that the side wall portion of each baffle is designed to seal against the side wall adjacent to the rim of the at least one tray for coating.
5. The apparatus according to claim 3, further characterized by additionally comprising a plurality of stamps disposed between the cover of the roller compartment and the top flange of the at least one cover tray, wherein at least a first seal of the a plurality of seals is disposed between a side wall edge of the baffle of the side wall portion of the at least one baffle and the side wall adjacent the flange of the at least one cover plate.
6. The apparatus according to claim 5, further characterized in that the at least one coating tray comprises a surface, wherein the at least one second seal of the plurality of seals is disposed between the surface of the at least one tray for coating and the cover of the compartment with rollers.
7. An apparatus for coating opposite surfaces of the meniscus of a metal bar, comprising: (a) at least one horizontally arranged coating tray, wherein the at least one tray for coating comprises an upper flange and wherein the upper flange it is configured to cover the at least one surface of the bar; (b) a roller compartment disposed adjacent to the at least one tray for coating, wherein the roller compartment comprises a cover, wherein the cover comprises an opening; and (c) at least one device for supplying gas, wherein the at least one device for supplying gas can be operated to supply gas to minimize the entry of ambient gases into the roller compartment and is disposed close to the cover. of the compartment with rollers.
8. The apparatus according to claim 7, further characterized in that it additionally comprises at least one roller configured to receive and form the metal bar, disposed within the roller compartment, wherein the at least one device for supplying gas is disposed between the top flange of the at least one tray for coating and the at least one roller.
9. The apparatus according to claim 8, further characterized in that the at least one device for delivery of gas is arranged between the cover portion of the roller compartment and the at least one roller.
10. The apparatus according to claim 8, further characterized in that the at least one device for gas supply is disposed between the cover of the roller compartment and the upper flange of the at least one tray for coating.
The apparatus according to claim 8, further characterized in that the at least one gas supply device is mounted to cover the compartment with rollers.
12. The apparatus according to claim 7, further characterized in that the at least one device for gas supply comprises a pipe and nozzle assembly.
13. The apparatus according to claim 7, further characterized in that the at least one device for gas supply comprises a plenum, where the plenum is mounted to cover the compartment with rollers.
14. A method for coating at least one meniscus surface of a metal bar, comprising: (a) providing: (i) at least one horizontally arranged coating tray, wherein the at least one tray for coating comprises a upper flange, (ii) a roller compartment disposed adjacent to the at least one tray for coating, wherein the roller compartment comprises a cover, wherein the cover comprises a cover. opening, and (ii) at least one baffle; (b) covering at least a portion of the opening with the at least one baffle; (c) advancing the metal bar through the opening in the roller compartment cover; (d) advancing the metal bar towards the upper flange of the at least one coating tray; (e) maintaining a coating metal in the top flange of the at least one tray for coating; and (f) coating the at least one surface of the metal bar with the coating metal when the metal bar advances beyond the upper flange of the at least one tray for coating.
15. The method according to claim 14, further characterized in that it further comprises receiving and forming the metal bar through at least one roller, wherein the at least one roller is disposed within the roller compartment.
16. The method according to claim 14, further characterized in that it further comprises: (a) providing at least one device for supplying gas; (b) supplying gas through the at least one device for supplying gas, wherein the at least one device for supplying gas is disposed close to the cover of the roller compartment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161490862P | 2011-05-27 | 2011-05-27 | |
| PCT/US2012/039286 WO2012166498A1 (en) | 2011-05-27 | 2012-05-24 | Meniscus coating apparatus and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX2013013880A true MX2013013880A (en) | 2014-01-23 |
Family
ID=46229927
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX2013013880A MX2013013880A (en) | 2011-05-27 | 2012-05-24 | Meniscus coating apparatus and method. |
| MX2019003776A MX2019003776A (en) | 2011-05-27 | 2013-11-26 | Meniscus coating apparatus and method. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX2019003776A MX2019003776A (en) | 2011-05-27 | 2013-11-26 | Meniscus coating apparatus and method. |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US9212414B2 (en) |
| EP (2) | EP3301200A1 (en) |
| JP (1) | JP5833232B2 (en) |
| KR (3) | KR20140027419A (en) |
| CN (1) | CN103649359B (en) |
| AU (2) | AU2012262701B2 (en) |
| BR (1) | BR112013030446A2 (en) |
| CA (1) | CA2836934C (en) |
| MX (2) | MX2013013880A (en) |
| TW (1) | TWI467051B (en) |
| WO (1) | WO2012166498A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104375719A (en) * | 2014-11-21 | 2015-02-25 | 合肥鑫晟光电科技有限公司 | Infrared touch screen, touch detection method and display equipment |
| WO2019111035A1 (en) | 2017-12-04 | 2019-06-13 | Annexair Inc. | Composite panel, composite material, impregnator and method for manufacturing a composite panel |
| WO2019111037A1 (en) | 2017-12-04 | 2019-06-13 | Annexair Inc. | Composite panel, composite material, impregnator and method for manufacturing a composite panel |
| WO2019111036A1 (en) * | 2017-12-04 | 2019-06-13 | Annexair Inc. | Composite panel, composite material, impregnator and method for manufacturing a composite panel |
| KR102341983B1 (en) * | 2018-02-15 | 2021-12-21 | 제이에프이 스틸 가부시키가이샤 | Continuous coating apparatus |
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- 2012-05-24 WO PCT/US2012/039286 patent/WO2012166498A1/en active Application Filing
- 2012-05-24 EP EP17196827.4A patent/EP3301200A1/en not_active Withdrawn
- 2012-05-24 BR BR112013030446A patent/BR112013030446A2/en not_active Application Discontinuation
- 2012-05-24 MX MX2013013880A patent/MX2013013880A/en unknown
- 2012-05-24 AU AU2012262701A patent/AU2012262701B2/en not_active Ceased
- 2012-05-24 CN CN201280033887.3A patent/CN103649359B/en not_active Expired - Fee Related
- 2012-05-24 EP EP12726528.8A patent/EP2714956A1/en not_active Withdrawn
- 2012-05-24 JP JP2014512095A patent/JP5833232B2/en not_active Expired - Fee Related
- 2012-05-24 CA CA2836934A patent/CA2836934C/en active Active
- 2012-05-24 US US13/479,382 patent/US9212414B2/en active Active
- 2012-05-24 KR KR1020137034465A patent/KR20140027419A/en not_active Application Discontinuation
- 2012-05-24 KR KR1020167005407A patent/KR20160029151A/en active Application Filing
- 2012-05-24 KR KR1020187034992A patent/KR101944240B1/en active IP Right Grant
- 2012-05-25 TW TW101118835A patent/TWI467051B/en not_active IP Right Cessation
-
2013
- 2013-11-26 MX MX2019003776A patent/MX2019003776A/en unknown
-
2017
- 2017-09-14 AU AU2017228661A patent/AU2017228661A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP2714956A1 (en) | 2014-04-09 |
| CN103649359A (en) | 2014-03-19 |
| KR20160029151A (en) | 2016-03-14 |
| US20120301623A1 (en) | 2012-11-29 |
| WO2012166498A1 (en) | 2012-12-06 |
| MX2019003776A (en) | 2019-07-01 |
| KR20140027419A (en) | 2014-03-06 |
| CA2836934C (en) | 2017-02-28 |
| AU2017228661A1 (en) | 2017-10-05 |
| TW201313954A (en) | 2013-04-01 |
| BR112013030446A2 (en) | 2016-09-27 |
| KR20180132971A (en) | 2018-12-12 |
| US9212414B2 (en) | 2015-12-15 |
| TWI467051B (en) | 2015-01-01 |
| CN103649359B (en) | 2016-03-09 |
| EP3301200A1 (en) | 2018-04-04 |
| AU2012262701B2 (en) | 2017-06-15 |
| JP2014515435A (en) | 2014-06-30 |
| CA2836934A1 (en) | 2012-12-06 |
| JP5833232B2 (en) | 2015-12-16 |
| KR101944240B1 (en) | 2019-01-31 |
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